Scrub management in storage class memory

A computing system for collecting diagnostic data from a storage class memory chip, the system comprising:

• a processor;
• and
• a computer readable storage medium comprising programming instructions that when executed cause the processor to:
• perform a scrub process on at least a portion of a storage class memory by:
• removing a portion of the storage class memory from use, wherein the portion comprises a plurality of memory locations;
• executing a first write operation to write a first pattern on each of the plurality of memory locations;
• executing a first read operation to obtain a first set of data written on each of the plurality of memory locations;
• analyzing the first set of data written on each of the plurality of memory locations to determine a number of stuck-at faults in the portion;
• and
• update one or more counters in an error rate table (ERT) to indicate the number of stuck-at faults.